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import GafferTest

import GafferVDB
import IECore
import IECoreScene
import IECoreVDB
import GafferVDBTest
import GafferScene

import imath


class PointsGridToPointsTest( GafferVDBTest.VDBTestCase ) :
	def setUp( self ) :
		GafferVDBTest.VDBTestCase.setUp( self )
		self.sourcePath = self.dataDir / "points.vdb"
		self.sceneInterface = IECoreScene.SceneInterface.create( str( self.sourcePath ), IECore.IndexedIO.OpenMode.Read )

	def testCanConvertPointsGridToPoints( self ) :

		sceneReader = GafferScene.SceneReader( "SceneReader" )
		sceneReader["fileName"].setValue( self.sourcePath )

		pointsFilter = GafferScene.PathFilter()
		pointsFilter["paths"].setValue( IECore.StringVectorData( [ "/vdb" ] ) )

		pointsGridToPoints = GafferVDB.PointsGridToPoints( "PointsGridToPoints" )
		pointsGridToPoints["in"].setInput( sceneReader["out"] )
		pointsGridToPoints["filter"].setInput( pointsFilter["out"] )

		points = pointsGridToPoints["out"].object("/vdb")

		self.assertTrue( isinstance( points, IECoreScene.PointsPrimitive ) )
		self.assertTrue( "P" in points )
		self.assertEqual( len( points["P"].data), 8 )
		self.assertEqual( points["P"].data[0], imath.V3f( -0.500004232, 0.366468042, 0.261457711  ) )

	def testVDBObjectLeftUnchangedIfIncorrectGrid( self ) :

		sceneReader = GafferScene.SceneReader( "SceneReader" )
		sceneReader["fileName"].setValue( self.sourcePath )

		pointsFilter = GafferScene.PathFilter()
		pointsFilter["paths"].setValue( IECore.StringVectorData( [ "/vdb" ] ) )

		pointsGridToPoints = GafferVDB.PointsGridToPoints( "PointsGridToPoints" )
		pointsGridToPoints["in"].setInput( sceneReader["out"] )
		pointsGridToPoints["filter"].setInput( pointsFilter["out"] )
		pointsGridToPoints["grid"].setValue( "nogridhere" )

		vdb = pointsGridToPoints["out"].object("/vdb")
		self.assertTrue( isinstance( vdb, IECoreVDB.VDBObject) )

if __name__ == "__main__":
	unittest.main()
